1<p>Valid nesting:</p>
2
3<p><strong><a href="url">Link</a></strong></p>
4
5<p><a href="url"><strong>Link</strong></a></p>
6
7<p><strong><a href="url"><strong>Link</strong></a></strong></p>
8
9<p>Invalid nesting:</p>
10
11<p><a href="url">[Link](url)</a></p>
12